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<h1 class="topictitle1">Adding HA Members</h1>
<div><p>If you want to use the HA feature after adding a member node, select a member node as an HA member. When the active node is faulty, services are automatically switched to the HA member node (standby node). For 1.6.0 and later versions, <span class="uicontrol"><b>Internal Communication Network Plane</b></span> is renamed as <span class="uicontrol"><b>Internal Communication Network</b></span>. This section uses 1.5.0 as an example.</p>
<div class="section"><h4 class="sectiontitle">Prerequisites</h4><ul><li>A member node has been added to the system.</li><li>The deployment mode of the member node to be added as an HA member must be the same as that of the active node.</li><li>An additional IP address has been reserved as the floating IP address of the member node to be added as an HA member.</li></ul>
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<div class="section"><h4 class="sectiontitle">Procedure</h4><ol><li><span>Choose <span class="menucascade" id="HA00020__ha00019_menucascade31053579148"><b><span class="uicontrol" id="HA00020__ha00019_uicontrol41059577142"><span id="HA00020__ha00019_text1054020121612"><strong>System</strong></span></span></b> &gt; <b><span class="uicontrol" id="HA00020__ha00019_uicontrol154661958121418"><span id="HA00020__ha00019_text8757278167"><strong>Infrastructure</strong></span></span></b> &gt; <b><span class="uicontrol" id="HA00020__ha00019_uicontrol54471544151"><span id="HA00020__ha00019_text1631251418164"><strong>Cluster Management</strong></span></span></b></span>.</span></li><li><span>Click <span class="uicontrol" id="HA00020__ha00019_uicontrol1161813395168"><b><span id="HA00020__ha00019_text353374216166"><strong>Backup Cluster</strong></span></b></span>.</span></li><li><span>Choose <span class="menucascade"><b><span class="uicontrol"><span><strong>HA Management</strong></span></span></b> &gt; <b><span class="uicontrol"><span><strong>Add HA Member</strong></span></span></b></span>.</span></li><li><span>In the <span class="uicontrol"><b><span><strong>Available Member Node</strong></span></b></span> area, select the member node to be added as an HA member.</span></li><li><span>In the <strong>Network Settings</strong> area, enter the HA member information. <a href="#HA00020__table4154132019214">Table 1</a> describes the related parameters.</span><p>
<div class="tablenoborder"><a name="HA00020__table4154132019214"></a><a name="table4154132019214"></a><table cellpadding="4" cellspacing="0" summary="" id="HA00020__table4154132019214" frame="border" border="1" rules="all"><caption><b>Table 1 </b>HA member network parameters</caption><colgroup><col style="width:29.5%"><col style="width:70.5%"></colgroup><thead align="left"><tr><th align="left" class="cellrowborder" valign="top" width="29.5%" id="mcps1.3.3.2.5.2.1.2.3.1.1"><p>Parameter</p>
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<th align="left" class="cellrowborder" valign="top" width="70.5%" id="mcps1.3.3.2.5.2.1.2.3.1.2"><p>Description</p>
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<tbody><tr><td class="cellrowborder" valign="top" width="29.5%" headers="mcps1.3.3.2.5.2.1.2.3.1.1 "><p><span><strong>Floating IP Address</strong></span></p>
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<td class="cellrowborder" valign="top" width="70.5%" headers="mcps1.3.3.2.5.2.1.2.3.1.2 "><p>Enter the floating IP address of the internal communication network plane. The floating IP address must be able to communicate with the internal communication network plane of the active node. If the internal communication network plane of the active node reuses the backup network, do not use the backup network IP address as the floating IP address.</p>
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<tr><td class="cellrowborder" valign="top" width="29.5%" headers="mcps1.3.3.2.5.2.1.2.3.1.1 "><p><span><strong>Quorum Gateway</strong></span></p>
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<td class="cellrowborder" valign="top" width="70.5%" headers="mcps1.3.3.2.5.2.1.2.3.1.2 "><p>Quorum gateways are used to check the link status of the standby node during active/standby switchover. The number of quorum gateways ranges from 1 to 3. Quorum gateways must be able to communicate with the internal communication network and the IP addresses of the quorum gateways must be unique. The IP address cannot start with 127.</p>
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</p></li><li><span>Click <span class="uicontrol"><b><span><strong>OK</strong></span></b></span>.</span><p><div class="note"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p>Due to the active node breakdown and the heartbeat interruption, the standby node cannot detect the floating IP address of the active node. But if the standby node can detect quorum gateways, the standby node will become the active node. The active/standby switchover takes about 5 minutes.</p>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="HA00014.html">Configuring Cluster HA</a></div>
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